Dear all, I found here http://mail.scipy.org/pipermail/numpy-discussion/2009-January/039681.html that to use* numpy.ma.testutils.assert_almost_equal* for masked array assertion, but I cannot find the np.ma.testutils module? Am I getting somewhere wrong? my numpy version is 1.6.2 thanks! Chao -- *********************************************************************************** Chao YUE Laboratoire des Sciences du Climat et de l'Environnement (LSCE-IPSL) UMR 1572 CEA-CNRS-UVSQ Batiment 712 - Pe 119 91191 GIF Sur YVETTE Cedex Tel: (33) 01 69 08 29 02; Fax:01.69.08.77.16 ************************************************************************************